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Finding the Fourth Proportional to 342,129.90, 513,186.75 and 92,811.90

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Solution

The fourth proportional to 342,129.90, 513,186.75 and 92,811.90 is: 139,215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,129.90 : 513,186.75 = 92,811.90 : x
  2. Step 2: Convert to fraction form
    342,129.90/513,186.75 = 92,811.90/x
  3. Step 3: Cross multiply
    342,129.90x = 513,186.75 × 92,811.90
  4. Step 4: Simplify right side
    342,129.90x = 47,629,837,322.33
  5. Step 5: Solve for x
    x = 47,629,837,322.33/342,129.90
  6. Step 6: Final answer
    x = 139,215.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.